package com.sojson.aspect;

import java.lang.reflect.Method;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.HandlerMapping;

import com.alibaba.fastjson.JSON;
import com.sojson.annotation.Log;
import com.sojson.base.impl.BaseUser;
import com.sojson.enums.core.EHttpMethod;
import com.sojson.enums.core.EStatusOper;
import com.sojson.project.sys.log.entity.po.LogOper;
import com.sojson.util.StringUtil;
import com.sojson.util.servlet.ServletUtil;
import com.sojson.util.token.TokenUtil;

import lombok.extern.slf4j.Slf4j;

/**
 * 操作日志记录处理
 *
 * @author liu
 * @date 2022-06-25
 */
@Order(Ordered.LOWEST_PRECEDENCE)
@Slf4j
@Aspect
@Component
public class LogAspect implements PointcutsWebBase {

    // 配置织入点
    @Pointcut("@annotation(com.sojson.annotation.Log)")
    public void logPointCut() {}

    /**
     * 处理完请求后执行
     *
     * @param joinPoint 切点
     */
    @AfterReturning(pointcut = "logPointCut()", returning = "jsonResult")
    public void doAfterReturning(JoinPoint joinPoint, Object jsonResult) {
        handleLog(joinPoint, null, jsonResult);
    }

    /**
     * 拦截异常操作
     *
     * @param joinPoint 切点
     * @param e         异常
     */
    @AfterThrowing(value = "logPointCut()", throwing = "e")
    public void doAfterThrowing(JoinPoint joinPoint, Exception e) {
        handleLog(joinPoint, e, null);
    }

    protected void handleLog(final JoinPoint joinPoint, final Exception e, Object jsonResult) {
        try {
            // 获得注解
            Log controllerLog = getAnnotationLog(joinPoint);
            if (controllerLog == null) {
                return;
            }

            // 获取当前的用户
            BaseUser user = TokenUtil.getUser();
            HttpServletRequest request = ServletUtil.getHttpServletRequest();

            // *========数据库日志=========*//
            LogOper logOper = new LogOper();
            logOper.setStatus(EStatusOper.SUCCESS.getCode());
            // 请求的地址
            logOper.setOperIp(ServletUtil.getTargetIp(request));
            // 返回参数
            logOper.setJsonResult(JSON.toJSONString(jsonResult));

            logOper.setOperUrl(ServletUtil.getRequestMapping(request));
            if (user != null) {
                logOper.setOperName(user.getUsername());
            }

            if (e != null) {
                logOper.setStatus(EStatusOper.FAIL.getCode());
                logOper.setErrorMsg(StringUtil.substring(e.getMessage(), 0, 2000));
            }
            // 设置方法名称
            String className = joinPoint.getTarget().getClass().getName();
            String methodName = joinPoint.getSignature().getName();
            logOper.setMethod(className + "." + methodName + "()");
            // 设置请求方式
            logOper.setRequestMethod(request.getMethod());
            // 处理设置注解上的参数
            getControllerMethodDescription(joinPoint, controllerLog, logOper);
            // 保存数据库
            TokenUtil.recordOper(logOper);
        } catch (Exception exp) {
            // 记录本地异常日志
            log.error(exp.getMessage(), exp);
        }
    }

    /**
     * 获取注解中对方法的描述信息 用于Controller层注解
     *
     * @param log     日志
     * @param logOper 操作日志
     * @throws Exception
     */
    public void getControllerMethodDescription(JoinPoint joinPoint, Log log, LogOper logOper) throws Exception {
        // 设置action动作
        logOper.setBusinessType(log.businessType().ordinal());
        // 设置标题
        logOper.setTitle(log.title());
        // 设置操作人类别
        logOper.setOperatorType(log.operatorType().getCode());
        // 是否需要保存request，参数和值
        if (log.isSaveRequestData()) {
            // 获取参数的信息，传入到数据库中。
            setRequestValue(joinPoint, logOper);
        }
    }

    /**
     * 获取请求的参数，放到log中
     *
     * @param logOper 操作日志
     * @throws Exception 异常
     */
    private void setRequestValue(JoinPoint joinPoint, LogOper logOper) throws Exception {
        String requestMethod = logOper.getRequestMethod();
        if (EHttpMethod.PUT.name().equals(requestMethod) || EHttpMethod.POST.name().equals(requestMethod)) {
            String params = argsArrayToString(joinPoint.getArgs());
            logOper.setOperParam(StringUtil.substring(params, 0, 2000));
        } else {
            Map<?, ?> paramsMap = (Map<?, ?>)ServletUtil.getHttpServletRequest()
                .getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
            logOper.setOperParam(StringUtil.substring(paramsMap.toString(), 0, 2000));
        }
    }

    /**
     * 是否存在注解，如果存在就获取
     */
    private Log getAnnotationLog(JoinPoint joinPoint) throws Exception {
        Signature signature = joinPoint.getSignature();
        MethodSignature methodSignature = (MethodSignature)signature;
        Method method = methodSignature.getMethod();

        if (method != null) {
            return method.getAnnotation(Log.class);
        }
        return null;
    }

    /**
     * 参数拼装
     */
    private String argsArrayToString(Object[] paramsArray) {
        String params = "";
        if (paramsArray != null && paramsArray.length > 0) {
            for (int i = 0; i < paramsArray.length; i++) {
                if (!isFilterObject(paramsArray[i])) {
                    Object jsonObj = JSON.toJSON(paramsArray[i]);
                    params += jsonObj.toString() + " ";
                }
            }
        }
        return params.trim();
    }

    /**
     * 判断是否需要过滤的对象。
     *
     * @param o 对象信息。
     * @return 如果是需要过滤的对象，则返回true；否则返回false。
     */
    public boolean isFilterObject(final Object o) {
        return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse;
    }

}